1 votes 1 votes If SYN=0 and ACK=1 What actually it indicates about ? Means if they are give some information about data packet or ACK packet? Computer Networks computer-networks + – srestha asked Dec 7, 2017 srestha 3.6k views answer comment Share Follow See all 6 Comments See all 6 6 Comments reply joshi_nitish commented Dec 7, 2017 reply Follow Share SYN=0 and ACK=1, denote either piggybacked acknowledgement or pure acknowledgement. 1 votes 1 votes Ashwin Kulkarni commented Dec 7, 2017 reply Follow Share SYN = 0 means it is not the synchronizing packet (These are not the first packets) ACK = 1 Acknowledgement is transferred. (Either with data - piggyback or without data - pure) 1 votes 1 votes srestha commented Dec 7, 2017 reply Follow Share Can we say from here , which is from sender and which comes from sender? 0 votes 0 votes srestha commented Dec 9, 2017 reply Follow Share @Ashwin why SYN cannot represent 1st packet? 0 votes 0 votes Ashwin Kulkarni commented Dec 9, 2017 reply Follow Share I said when SYN =0 it is surely not first packet. 0 votes 0 votes srestha commented Dec 9, 2017 reply Follow Share yes, why? 0 votes 0 votes Please log in or register to add a comment.
Best answer 5 votes 5 votes 1) SYN=1 , ACK =0 {First segment or request for connection establishment} 2) SYN=1 ACK =1 {second segment or reply segment} here ACK= 521 is ack number. 3) SYN=0, ACK=1 {pure ACK} SYN=0, ACK=1 {piggybacked ACK} Akash Mittal answered Dec 7, 2017 • selected Dec 9, 2017 by srestha Akash Mittal comment Share Follow See 1 comment See all 1 1 comment reply srestha commented Dec 9, 2017 reply Follow Share SYN representing sequence number? 0 votes 0 votes Please log in or register to add a comment.